<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrapper">
                        <div class="button">{{this.listCity}}</div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <div class="area" v-for="(item, key) in cities" :key="key" :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapActions } from 'vuex'
export default {
  name: 'CityList',
  props: {
    cities: Object,
    hot: Array,
    letter: String
  },

  computed: {
    ...mapState({
      listCity: 'city'
    })
  },

  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapActions(['changeCity'])
  },

  watch: {
    letter () {
      // console.log(this.letter)
      // 字母跳转
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element)
        this.scroll.scrollToElement(element)
      }
    }
  },

  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  }
}
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color : #ccc
    &:after
      border-color : #ccc

  .list
    overflow : hidden
    position : absolute
    top: 1.58rem
    left : 0
    right : 0
    bottom : 0

  .title
    line-height : .54rem
    background-color : #eee
    padding-left : .2rem
    color : #666
    font-size : .26rem

  .button-list
    padding : .1rem .6rem .1rem .1rem
    overflow : hidden

  .button-wrapper
    float : left
    width : 33.33%

  .button
    margin : .1rem
    padding : .1rem 0
    text-align : center
    border : .02rem solid #ccc
    border-radius : .06rem

  .item
    line-height : .76rem
    padding-left : .2rem
</style>
